t is not appropriate that group icon and banner data is stored in the gallery of the user who uploaded it, rather than in the group.

This would cause trouble.

Can you make it so that group icons and group banners are stored in the group?

It can be reproduced by following the steps below.

1: Upload images for the group icon and banner

2: Delete those images from the gallery of the user who uploaded them

3: The group icons and banners corresponding to the deleted images will no longer be displayed

This is not about VRC+. It's about where the group icon and banner data is stored.